Walter deafer



July 29, 1930.. w. DRAPER 7 1,771,436

DRAWING OR DRAFT'ING ROLLER FOR TEXTILE SPINNING MACHINERY Filed Aug. 27, 1929 D f E I; B 2 A INVE/VT'OR Wa//r Dra er HT TUB/V5 Y Patented July 29, 1930.

WALTER DRAPEI'LOF oHoRLEY, ENGLAND DRAW'ING on DRAFTING ROLLER r03 TEXTILEQSPINNING MACHINERY; k

Application filed August 27, 1829, Serial No. 388,703,.and in Great Britain Februaryfl, 1929. 5

This invention has reference to textile spinning machinery and particularly to machinery used in the spinning oi: fibrous materials, here drawing or drafting takes place,

5 examples of such nachines as used in cot-ton spinning being those knownas derbys, ribbon lap machines, combers, draw, slubbing, intermediate, roving or jack andring frames, and mules.

' The object of drawing or drafting is'to straighten and align the fibresof the material such as cotton sliver or roving, and tocause ij them toslide over one anotheigthuselongat- 'ing and attenuating the ShVGIZ The ultimate mm of all'spinning operations is to produce a yarn Which is strongand un1 for1n. Inthe, course 015- manufacture the sliver-passes through'a number of consecutive processes beforeit becomes the flinished 'yarmand in i i i 1y controlled by both rollers and the front many of these draftingis'a feature, is therefore of'the utmost importance thatdrawa Way as to yield aunii'orm material, Without Weak or thin places an'd'also that'the process employed should be capable of yielding a satisfactory yarn. r 4

I have established that if both top and bottom rollers in the line immediately behind a the delivery or front rollersare made plain and smooth of polished metal and the Weight of the top roller alsohavi-ng these characteristics is proportioned so as to hold the sliver firmly between the two rollers Without any nip, a remarkable improvement takes place in the drafting results when a lines of rollers are fluted.

According to my invention as applied to' a three line system, I use forthe back and front rollers the usual rollers i. e. a fluted- I employ an unfluted bottom roller of smooth and polished metal in conjunction with an unfluted top roller having the same characterand strong the other bottom front or of rollers and B andB and C.

istics and of sulficientweight to give a firm hold to the cotton sliverflvvithout nipping or flocking any of thefibresg, I a. f ",The top rollersof theiniddle lines must consequently be of considerablenveight com pared to the very light-rollers recently suggested andin use, jTheirexactYweight will in every case depend onthe cotton used and-the stage of the processfand it willbereadily understood that'it is notpossible to lay down any figure of Weight'and size except by Way of examplejbut it is easy to ascertain this by trial in any given case if itis borne in mind withoutnipping it, so as to obtain a uniform yarn, As a rule a lighter topmiddle roller Willbesuitable for fine counts and a heavier for the more coarsecounts.

that the object is to hold thesliver firmly- Q rollers aret-herefore enabled to maintainan even draft on" all the fibres. 'Thi'sfarfangement obviates theuneve'nness of pull W'hic'h"l 1 believe tobe the main defect in the existing .r ys e e he qt m roll rai fluted; and

the top plain, becauseinthe'latteccaseas I jections. Moreover .Iny invention; E obviates thereto; A H, W N I; In the drawingthe bottomiront ordel-ivery roller jWlllCh isfiuted is marked A, and thetop delivery roller is marked D. .The bottom invention a plain or smoothnon-fiuted roller and its top rollerisgniarked E. The bottom back or feed'roller C is fluted as usual and co-operates With the top back feed roller F. In the dravvims the rollersettings, that is the distances between the rollers are indicated by the letters G and H, which respectively represent the distances betweenthe bottomilines m dle roller B is,:according-to; this have foundibyexperimentthererisa strong tendency forthe top fibres to lllQVQfOlWfll'Cl I "while thebottom vfibres; are lockedQby1 the pro- 4 anynecess'ity for aprons, and, Whilenot; re

I In the accompanyingdrawing-is shoWnJaallowance would have to be'made when using existing spinning methods. Asanjndicae 7 tion of adjustments which may be required the following information is given;

'(1) Vhere closer settings are required for shorter stapled cottons than those given below the diameter ofthe middle rollers B I and E may be reduced}- Diamrs. of Diamrs. of top Roller i I 1 bottom rollers r lers settings Welgm top rollers Cotton 7 a s 0 1) F i o n D- E F 3 i I v' Inchcs Inches Iiwlzas Inches Inches Inches Inches 1mm 7 1 yp l k p l :H 3: 3% H 1% Tllllis roller 5 oz. appr. 2lbs.2oz.appr.

, v a s a e k v V V p I i wbeifiht of .E tian U ers 1 'sta lc; c ,1 i 1 1 a 2 15 1 s. on

up 9n $4 p H 1 H H A it applied 5 pp l -appr.

5 le I j b means I n nericanlMemphis) 1}4' staple l g 1 1, M c 1% H 1% -"g g gg 5 oz. appr. 2lbs.2oz.appr. ,7 a. i u s u a l i e a 8 weight. 1

Amencan(Memph1s) 1i; S vfl I l g e; /1 /4, H i 5 .01. appr. 21bs.2oz. appr.

(2) The Weights oft-he top rollerswill vary according to the diameter of the rollers,

and when using the invention on a spinning mule, if'a roller of A diameter be used the weightshould-befrom 31/ to iozs. and'generally it will befound more convenient to use a lighter-top roller on a mule than in a ring frame. V

, fVVhat I claim as my invention and desire to secure by'Letters Patent'is':- A drawing'head for a textile spinning ma chine havingfluted bottom rollers at the back and front and having a bottom roller immediately behind the front deliyery roller, I

- unfiutedfand' made of smooth polished metal, theztop roller corresponding therewith having the same characteristicsand-bein of such a weight as to hold the roving or s iver firmly against the bottom roller and against" the draft ofthe 'front rollers, the diameters of the smooth bottom and top rollers being 7 

